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DEIF A/S Frisenborgvej 33 DK-7800 Skive

Tel.: +45 9614 9614 Fax: +45 9614 9615

[email protected] www.deif.com

Automatic Genset Controller, AGC

DESCRIPTION OF OPTIONS

Options G4, G5 and G8

Power management Functional description

Display units

Power management setup

Power management functions

Parameter lists

Document no.: 4189340696CSW version:

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1. Delilmi tation1.1. Scope of options G4, G5 and G8...........................................................................................................5

2. General information

2.1. Warnings, legal information and safety..................................................................................................62.1.1. Warnings and notes ......................................................................................................................62.1.2. Legal information and disclaimer ..................................................................................................6

2.1.3. Safety issues ................................................................................................................................6

2.1.4. Electrostatic discharge awareness ...............................................................................................6

2.1.5. Factory settings ............................................................................................................................6

3. Descrip tion of opt ions3.1. ANSI numbers........................................................................................................................................7

3.1.1. ANSI..............................................................................................................................................7

3.2. Options G4, G5and G8..........................................................................................................................7

3.2.1. G4, G5 and G8..............................................................................................................................73.3. Terminal description...............................................................................................................................9

3.3.1. Description of terminals.................................................................................................................9

3.4. Breaker feedbacks...............................................................................................................................103.4.1. Generator breaker.......................................................................................................................10

3.4.2. Mains breaker (MB) feedback......................................................................................................10

3.4.3. Tie breaker (TB)...........................................................................................................................103.5. Wiring diagrams...................................................................................................................................11

3.5.1. Diagrams.....................................................................................................................................11

4. Functional description4.1. Power management functions..............................................................................................................12

4.1.1. Description of functions ..............................................................................................................12

4.2. Terminal strip overview........................................................................................................................13

4.2.1. AGC generator unit......................................................................................................................13

4.2.2. AGC mains unit............................................................................................................................15

4.2.3. AGC bus tie unit...........................................................................................................................174.3. Applications..........................................................................................................................................19

4.3.1. Application possibilities................................................................................................................19

4.3.2. Island operation plant..................................................................................................................20

4.3.3. Parallel with mains plant..............................................................................................................21

4.3.4. Dual mains plant..........................................................................................................................22

4.3.5. ATS plant.....................................................................................................................................234.3.6. ATS plant, multiple start...............................................................................................................23

4.3.7. ATS plant, mains unit...................................................................................................................24

4.3.8. Multiple mains..............................................................................................................................25

5. Display units5.1. DU for option G5..................................................................................................................................26

5.1.1. Option G5 displays .....................................................................................................................26

5.2. Generator unit display..........................................................................................................................265.2.1. Display.........................................................................................................................................26

5.3. Mains unit display.................................................................................................................................275.3.1. Display.........................................................................................................................................27

5.4. BTB unit display...................................................................................................................................27

5.4.1. Display.........................................................................................................................................27

6. Power management setup6.1. Initial power management setup..........................................................................................................28

6.1.1. How to set up...............................................................................................................................28

6.1.2. Display setup...............................................................................................................................28

6.1.3. PC software setup.......................................................................................................................28

6.1.4. Application design........................................................................................................................28

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6.2. Remove unit from PM...........................................................................................................................316.2.1. Possibilities..................................................................................................................................31

6.2.2. Auxiliary supply OFF....................................................................................................................31

6.2.3. Quick setup..................................................................................................................................32

6.2.4. Auxiliary supply ON.....................................................................................................................326.3. CANbus failure handling.......................................................................................................................336.3.1. CAN failure mode........................................................................................................................33

6.3.2. Redundant CANbus communication............................................................................................34

6.3.3. CANbus alarms............................................................................................................................34

6.3.4. CANbus fail class.........................................................................................................................35

6.4. Quick setup..........................................................................................................................................35

6.4.1. Quick setup..................................................................................................................................356.4.2. Limitations....................................................................................................................................37

6.5. 9180 Quick setup.................................................................................................................................38

6.5.1. 9180 Quick setup.........................................................................................................................38

6.5.2. 9190 Application broadcast.........................................................................................................38

7. Power management functions

7.1. Command unit......................................................................................................................................407.1.1. Command unit.............................................................................................................................40

7.2. Load-dependent starting and stopping.................................................................................................40

7.2.1. Starting and stopping...................................................................................................................407.2.2. Terminology.................................................................................................................................41

7.2.3. Principle available power method.............................................................................................44

7.2.4. Principle percentage method....................................................................................................44

7.2.5. Adjusting load-dependent start....................................................................................................45

7.2.6. Adjusting load-dependent stop....................................................................................................46

7.2.7. Power window..............................................................................................................................477.3. Load management...............................................................................................................................47

7.3.1. Load management.......................................................................................................................47

7.3.2. Functionality description (refer to the diagram below).................................................................48

7.4. Load sharing.........................................................................................................................................49

7.4.1. Load sharing ...............................................................................................................................497.5. Island ramp up......................................................................................................................................50

7.5.1. Island ramp up with load steps....................................................................................................50

7.6. Fixed power ramp up with load steps...................................................................................................51

7.7. Freeze power ramp..............................................................................................................................51

7.8. ATS applications..................................................................................................................................52

7.8.1. AGC mains installed....................................................................................................................527.8.2. ATS island mode.........................................................................................................................52

7.9. Fail class..............................................................................................................................................53

7.10. Local/remote/timer operation..............................................................................................................53

7.10.1. Local selection...........................................................................................................................53

7.10.2. Remote selection.......................................................................................................................54

7.10.3. Plant operation...........................................................................................................................547.10.4. Timer selection..........................................................................................................................54

7.10.5. Principle.....................................................................................................................................55

7.11. Multi starting gensets.........................................................................................................................56

7.11.1. Multi-start configuration.............................................................................................................56

7.11.2. Numbers to start........................................................................................................................57

7.11.3. Minimumnumbers running........................................................................................................577.12. Priority selection.................................................................................................................................58

7.12.1. Manual.......................................................................................................................................58

7.12.2. Running hours...........................................................................................................................60

7.12.3. Fuel optimisation........................................................................................................................61

7.13. Conditional connection of heavy consumers......................................................................................647.13.1. Power feedback from the heavy consumer...............................................................................65

7.13.2. Engagement sequence for HCs with fixed load.........................................................................67

7.14. Ground relay.......................................................................................................................................67



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7.14.1. Ground relay..............................................................................................................................677.15. Stop of non-connected gensets..........................................................................................................68

7.16. Secured mode....................................................................................................................................68

7.17. Base load...........................................................................................................................................69

7.18. Asymmetric load sharing (LS)............................................................................................................697.19. Tie breaker configuration....................................................................................................................707.19.1. Tie breaker selection.................................................................................................................70

7.19.2. Tie breaker control.....................................................................................................................70

7.19.3. Tie breaker open point...............................................................................................................70

7.19.4. Power capacity..........................................................................................................................71

7.20. Island application with TB...................................................................................................................72

7.21. Multiple mains....................................................................................................................................737.21.1. Definitions..................................................................................................................................74

7.21.2. Configuration.............................................................................................................................76

7.21.3. Plant mode handling..................................................................................................................77

7.22. Dual mains.........................................................................................................................................79

7.22.1. Configuration.............................................................................................................................80

7.22.2. Plant mode handling..................................................................................................................81

7.22.3. Internal CAN ID..........................................................................................................................837.22.4. AGC mains unit redundancy......................................................................................................83

7.22.5. Tie breaker configuration...........................................................................................................84

7.23. Configurable CAN IDs........................................................................................................................85

7.24. CAN flags...........................................................................................................................................867.25. Common PF control...........................................................................................................................86

8. Parameter lists8.1. Common settings.................................................................................................................................88



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1. Delilmitation

1.1 Scope of options G4, G5 and G8

This description of options covers the following products:

AGC-3 SW version 3.6x.x or later

AGC-4 SW version 4.1x.x or later

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2. General information

2.1 Warnings, legal information and safety

2.1.1 Warnings and notesThroughout this document, a number of warnings and notes with helpful user information will be presented.

To ensure that these are noticed, they will be highlighted as follows in order to separate them from the gener-

al text.

Warnings

Warnings indicate a potentially dangerous situation, which cou ld result i n death, personal in-

jury or damaged equipment, i f certain guidelines are not fo llowed.

Notes

Notes provide general information, which will be helpful for the reader to bear in mind.

2.1.2 Legal information and disclaimerDEIF takes no responsibility for installation or operation of the generator set. If there is any doubt about how

to install or operate the engine/generator controlled by the Multi-line 2 unit, the company responsible for the

installation or the operation of the set must be contacted.

The Multi-line 2 unit is not to be opened by unauthorised personnel. If opened anyway, the war-

ranty will be lost.

Disclaimer

DEIF A/S reserves the right to change any of the contents of this document without prior notice.

2.1.3 Safety issuesInstalling and operating the Multi-line 2 unit may imply work with dangerous currents and voltages. Therefore,

the installation should only be carried out by authorised personnel who understand the risks involved in work-

ing with live electrical equipment.

Be aware of the hazardous live currents and voltages. Do not touch any AC measurement in-

puts as this could lead to injury or death.

2.1.4 Electrostatic discharge awarenessSufficient care must be taken to protect the terminal against static discharges during the installation. Once the

unit is installed and connected, these precautions are no longer necessary.

2.1.5 Factory settingsThe Multi-line 2 unit is delivered from factory with certain factory settings. These are based on average values

and are not necessarily the correct settings for matching the engine/generator set in question. Precautions

must be taken to check the settings before running the engine/generator set.

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3. Description of options

3.1 ANSI numbers

3.1.1 ANSI

Function ANSI no.

Power management -

3.2 Options G4, G5 and G8

3.2.1 G4, G5 and G8The options G4, G5 and G8 (power management) are software options and therefore not related to any hard-

ware apart from the standard-installed hardware.

The options G4, G5 and G8 are alike in the basic functionality. In the below table the differences are shown:

Product AGC gen. AGC mains AGC bus tie

Option G4 X X

Option G5 X X X

Option G8 X

This means that all functionalities available in the G4 and G8 options will also be available in the G5 option,

but all power management functionalities regarding the mains connections and the sequences handling the

mains are not available in the G4 option, and only generator fulctionality will be available in the G8 option.

As the basic power management functions are similar in the three options, it will be possible to mix controllers

specified with one of the three options in the same application.

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A number of AGC units are being used in the power management application, i.e. one for each mains breaker

and tie breaker (AGC mains unit), if installed, one for each bus tie breaker (AGC bus tie unit) and one for

each generator (AGC generator unit). All units communicate by means of an internal CANbus connection.

The AGC mains unit includes the power management option and can therefore only be used with option G5

applications. The generator AGC unit must be specified with either option G4, G5 or G8, because this unit

can be used in single genset applications and in power management applications.



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3.3 Terminal description

3.3.1 Description of terminalsThe CANbus interface for the internal communication between AGC units in a G4/G5/G8 application is placed

on the engine interface PCB in slot #7.

Term. Function Technical data Description

98 +12/24V DC 12/24V DC +/-30% DC power supply/common for 118

99 0V DC

100 MPU input 2-70V AC/10-10.000 Hz Magnetic pick-up

101 MPU GND

102 A 0(4)-20 mA

Digital

Pt100Pt1000

VDO

0-40V DC

Multi-input 1

103 B

104 C

105 A Multi-input 2

106 B

107 C

108 A Multi-input 3

109 B

110 C

111 Com. Common Common for terminals 112-117

112 Digital input 112 Optocoupler Configurable

113 Digital input 113 Optocoupler Configurable114 Digital input 114 Optocoupler Configurable

115 Digital input 115 Optocoupler Ext. engine failure/configurable

116 Digital input 116 Optocoupler Start enable/configurable

117 Digital input 117 Optocoupler Running feedback/configurable

118 Digital input 118 Optocoupler Emergency stop and common for 119 and 120

119 NO Relay24V DC/5 A Run coil

120 NO Relay24V DC/5 A Start prepare

121 Com. Relay250V AC/8 A Crank (starter)

122 NO

123 Com. Relay24V DC/5 A Stop coil w/wire failure detection

124 NO

A1 CAN-H CANbus interface A

A2 GND

A3 CAN-L

B1 CAN-H CANbus interface B

B2 GND



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Term. Function Technical data Description

B3 CAN-L

In menus 7540 and 7550, you can choose which CANbus interface you wish to use for internal communica-

tion. For CANbus redundancy it is possible to use both communication interfaces.

If the LED marked "CAN B" on the main unit is alive, then the CANbus port(s) is (are) switched

on.

3.4 Breaker feedbacks

3.4.1 Generator breakerThe feedbacks of the generator breaker must always be connected (terminals 26 and 27).

3.4.2 Mains breaker (MB) feedback

MB present: The feedbacks of the mains breaker must always be connected (terminals 24 and 25).

MB not present: Selected in the power plant constructor (USW).

When no MB is represented, the MB open and close relays together with the inputs for MB

open and close feedbacks (terminals 24 and 25) will be configurable.

3.4.3 Tie breaker (TB)

TB present: The feedbacks of the tie breaker must always be connected (terminals 26 and 27).

TB not present: Selected in the power plant constructor (USW)

When no TB is represented, the TB open and close relays together with the inputs for TB open

and close feedbacks (terminals 26 and 27) will be configurable.



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3.5 Wiring diagrams

3.5.1 DiagramsThe following diagrams show examples with three AGC units connected, e.g. one AGC mains and two gener-

ator AGC units.

Multi-line 2

CANbus interface 1

A1 A2 A3

H GND L

Multi-line 2

CANbus interface 1

A1 A2 A3

H GND L

Multi-line 2

CANbus interface 1

A1 A2 A3

H GND L

120 120

Multi-line 2

CANbus interface 2

B1 B2 B3

H GND L

Multi-line 2

CANbus interface 2

B1 B2 B3

H GND L

Multi-line 2

CANbus interface 2

B1 B2 B3

H GND L

120 120

Multi-line 2

CANbus interface 1

A1 A2 A3

H GND L

Multi-line 2

CANbus interface 2

B1 B2 B3

H GND L

Multi-line 2

CANbus interface 1

A1 A2 A3

H GND L

120 120

As you can see from the last example, it is possible to mix CANbus interface 1 and 2.

For distances above 300 metres we recommend to use a CAN to fibre converter.

Do not connect the cable shield to the GND terminal of the AGC units.



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4. Functional description

4.1 Power management functions

4.1.1 Description of functionsIn the following chapter, the power management functions of the AGC are listed.

Plant modes:

Island mode (no mains unit)

Automatic Mains Failure (needs mains unit)

Fixed power/base load (needs mains unit)

Peak shaving (needs mains unit)

Load takeover (needs mains unit)

Mains power export (needs mains unit)

Display: Mains unit display showing mains breaker and tie breaker

Generator unit showing generator and generator breaker

Power management functions:

Load-dependent start/stop

Priority selection

Manual

Running hours

Fuel optimisation

Ground relay control

ATS control

Safety stop (fail class = trip and stop)

Load management Multiple mains support

Secured mode

Quick setup/broadcast

Base load

Heavy consumer (HC)

Asymmetric load sharing (LS)

Common PF control

CAN flags

Please refer to the Designers Reference Handbook for standard functions not relating to the

power management option.

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4.2 Terminal str ip overview

4.2.1 AGC generator unit



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4.2.2 AGC mains unit



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4.2.3 AGC bus tie unit



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4.3 Appl ications

4.3.1 Application possibili tiesThe G4 and G5 options can be used for the applications listed in the table below. The G8 option can only be

used for an island application with DG units.

Appl ication Drawing below Comment

Island operation Island mode plant Multiple gensets

Automatic Mains Failure Parallel with 1-16 mains No back synchronising

Automatic Mains Failure Parallel with 1-16 mains With back synchronising

Automatic Mains Failure ATS plant, multiple start Multiple start system

Automatic Mains Failure ATS plant, mains unit Mains unit installed

Fixed power Parallel Also called base load

1-16 mains units

Mains power export Parallel 1-16 mains units

Load takeover Parallel 1-16 mains units

Peak shaving Parallel 1-16 mains units

Refer to the Designers Reference Handbook for description o f the individual genset modes.

Regarding AC and DC connections fo r the individual applications, please refer to the Installa-

tion Instructions.



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4.3.2 Island operation plantIn an application where up to 16 gensets are installed, the AGC will automatically operate in an island mode

with load-dependent starting and stopping.

G

Generator

breaker

(GB 1)

Diesel generator set 1

Busbar

G

Generator

breaker

(GB 2)


CANbus

Controller

Display 1

Controller

Display 2

If a mains unit is installed and connected (e.g. for preparing future requirements to the application), the island

mode operation is selected in the mains unit.



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4.3.3 Parallel with mains plantAn application where a mains breaker is installed together with up to 16 gensets is shown below.

The application also supports a redundant mains unit.

The application is shown with a tie breaker, but it is also possible to use the application without a tie breaker.

The tie breaker can only be placed as shown in the drawing below.

G

Generator

breaker

(GB 1)


Busbar

G

Generator

breaker

(GB 2)


CANbus

Tie

Breaker

(GB)

Mains

breaker

(MB)

Mains

Consumers

Controller

Display 1

Controller

Display 2

Controller

Display mains

This one-line diagram is also valid for AMF plants without back synchronising and load take-

over plants without possibil ity of synchron ising the genset to the mains.

If no CTs are installed on the AGC mains, a 4-20 mA power transducer TAS-331 can be used

instead.

The CT measurements are used when the transducer setup is 4/20 mA = 0/0 kW. The transduc-

er is used when the transducer setup is changed from 0/0 kW.



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4.3.4 Dual mains plantAn application with two mains breakers installed together with up to 16 gensets is shown below.

The application also supports redundant AGC mains units.

The application is shown with a tie breaker, but it is also possible to use the application without a tie breaker.

G

Generator

breaker

(GB 1)


Busbar

G

Generator

breaker

(GB 2)


CANbus

Tie

Breaker

(GB)

Mains

breaker(MB 1)

Mains 1

Consumers

Mains

breaker(MB 2)

Mains 2

Optional Optional

Controller

Display 1

Controller

Display 2

Controller

Display mains 1B

Controller

Display mains 2A

Controller

Display mains 2B

Controller

Display mains 1A

The tie breaker can only be placed as shown in the drawing.

In this application it wi ll not be possible to synchronise the tie breaker.



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4.3.5 ATS plantApplications that use an ATS for switching between mains supply and generator supply are supported as

well. Two application examples which use an ATS are shown below.

4.3.6 ATS plant, mult iple start



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4.3.7 ATS plant, mains unit

Display

Tie

Breaker

(TB)

Mains

Consumers

Controller

G


Controller

Display 3

G


Busbar

G


CANbus

Controller

Display 1

Controller

Display 2

ATSON/OFF

Mains okay



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4.3.8 Multiple mainsAn example of a multiple mains plant is shown below. This is just an example; please refer to the chapter on

multiple mains for further information about the possible combinations.

G

Generator

breaker

(GB 1)


Busbar

G

Generator

breaker

(GB 2)


CANbus

Tie

breaker

(TB 17)

Mains

breaker

(MB 17)

Mains 17

Consumers

BTB 33

G

Generator

breaker

(GB 3)


BUSBAR

G

Generator

breaker

(GB 4)


CANBUS

Tie

breaker

TB 18)

Mains

breaker(MB 18)

Mains 18

Consumers

Controller

Display 1

Controller

Display 2

Controller

Display 3

Controller

Display BTB 33

Controller

Display 4

Controller

Display mains 17

Controller

Display mains 18



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5. Display units

5.1 DU for opt ion G5

5.1.1 Option G5 displaysThree displays exist for the option G5.

See the Designers Reference Handbook or the Operators Manual for detailed information

about push-button functions and LED indication.

5.2 Generator uni t display

5.2.1 Display

Automatic Gen-set Controller

multi-line AGC

VIEW

LOG

Auto

Alarm Inh.

Self check ok

Power

SEL

BACK

MODE

JUMP

START

INFO

STOP

Alarm

Alarm

OnRun

G

Load

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5.3 Mains uni t display

5.3.1 Display


VIEW

LOG

Auto

Alarm Inh.

Self check ok

Power

SEL

BACK

MODE

JUMP

START

INFO

STOP

Alarm

Alarm

multi-line AGC MAINS

On On

Load

5.4 BTB unit display

5.4.1 Display


multi-line AGC BUS TIE

VIEW

LOG

Auto

Alarm Inh.

Self check ok

Power

SEL

BACK

On

INFO

JUMP

Alarm

Alarm

MODE

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6. Power management setup

6.1 Init ial power management setup

6.1.1 How to set upThe AGC is set up using the display and the PC utility software.

6.1.2 Display setupEnter the menu 9100 using the JUMP push-button. Select one of the following AGC types:

1. Mains unit

2. DG unit

3. BTB unit

When this setting is adjusted, the device returns to factory settings! Therefore this must be

changed prior to other adjustments.

Enter the menu 9170 using the JUMP push-button. Select "CAN protocol 2" for a multi mains functionality.

Select "CAN protocol 1" for dual mains or single applications.

An alarm appears i f CAN protocol 2 is needed.

6.1.3 PC software setupThe communication ID must be adjusted in the utility software for each of the AGC units. In the screen shot

below, the internal communication ID is set to 1.

The numbering of the communication IDs must always start from the lowest number, so an application always

includes a DG with ID 1. The principle also applies to the AGC mains where the numbering starts from ID 17and to the BTB units where the numbering starts from ID 33.

6.1.4 Application designThe application is designed through the utility software. Please select configuration.

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Select a new application and adjust the settings in this dialogue box.



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Description Comments

Product

type

Select AGC. PPM is a power management system for marine use.

Plant

type

Select between

Single DG

Standard

Dual mains

Genset group

plant

Genset group

Use "single DG" if option G5 is not selected (or if single functionality is

needed for a G5 AGC).

Use "standard" if a power management application is needed.

Use "dual mains" if the power management application with two mains

units known from version 3.0-3.2 are to be used.

Genset group plant and genset group are used for power plants con-

sisting of 17-256 gensets in the same application. Contact

[email protected] further information.

Config-

uration

selec-

tion

The AGC is able to in-

clude four applications.

One of these can be

active.

Write a proper name of

your application.

Press "Yes" in the pop-up window to set the application to active when

downloading it to the AGC.

It is possible to see which application is active when the USW is con-

nected to the AGC.

Bus tie

options

Select "Wrap busbar"

if the BTBs are con-

nected in a ring.

CAN

line op-

tions

CAN line A: Connect

A1-A3.

CAN line B: Connect

B1-B3.



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Now the application can be designed using the section control panel.

For each area it is defined whether a generator and a mains is present, and the number and type of breakers.

6.2 Remove unit from PM

6.2.1 Possibi lit iesIf one or more units have to be taken out of the power management system, the following possibilities exist

depending on the situation.

6.2.2 Auxil iary supply OFFThe auxiliary supply must be removed from the AGC. This means that a CANbus alarm occurs on the other

AGCs. These alarms appear in a 2 DG plant where ID 2 is powered down:



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Alarms Functioning unit (ID 1)

System alarm Failed CAN tx line

System alarm CAN ID 2 MISSINGMenu 7533 Miss. all units

Menu 7535 Any DG missing

The alarms will be present at all times during the failure. A reconfiguration of the power plant is required to

remove the alarms.

6.2.3 Quick setupNormally, the quick setup function is only used for simple rental applications. It only requires a few settings to

be running, and these settings can be made via the DU-2 display on the AGC, so no utility software is nee-

ded.

For more details, please refer to the chapter "Quick setup" in this document.

The mode changes according to the setting in CAN failure mode (menu 7532).

When the AGC is reconnected, the ID will automatically be enabled again in the other units when the ID has

been recognised. If the AGC that is reconnected is a new unit with the factory settings set in the parameter

file, a "Duplicate CAN ID" error message will appear. When an ID is chosen for the new unit, and the ID chos-

en is already active in another device, the error message "CAN ID not available" will appear, and the ID is

reset to the start value.

6.2.4 Auxil iary supply ONIf a failure appears on the CANbus lines of an AGC, the following alarms appear in the example where a fail-

ure appears at ID 2:

Alarms Defective unit Funct ioning unit

System alarm Failed CAN tx line Failed CAN tx line

System alarm CAN ID 1 MISSING CAN ID 2 MISSING

Menu 7533 Miss. all units Miss. all units

Menu 7535 Any DG missing Any DG missing

If the auxiliary supply of the unit where the CANbus is not functioning is connected, the AGC can be adjustedto another mode than AUTO. In that case the genset will not take part in the power management routines.

Semi-automatic start or automatic start is possible if the mode is changed to SEMI or AUTO

mode. The only exception to this is when BLOCK mode is selected on a genset AGC. In this

situation the GB can be closed withou t allowance from the power management system.



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6.3 CANbus failure handling

6.3.1 CAN failure modeIn case of a CAN failure on the internal CAN controlling the power management, the system can be set up in

different ways. In menu 7530 it is decided how the power management system will react in case of a CAN

failure.

1. If "MANUAL" is selected, all AGC units will change mode to manual mode, and this way the regula-

tors will have no reaction, and it will not be possible to close any breakers.

Example 1:

A break on the CAN line is made between ID1 and ID2 shown below.

Both gensets are running and all breakers are closed.

When the break occurs, the regulators will stop on both gensets, but they will stay online. As the gensetshave no valid information about the other unit, over time a blackout can occur as no load sharing is active

between the units.

If for example six gensets are available in an island application, and the CAN failure happens between ID3

and ID4, the load sharing will still be disabled between all units, as it is the manual mode which is activated.

If the CAN error happens when no gensets are running, it will block the whole system and it will not be possi-

ble to start any gensets, before the CAN error has been fixed.

G

Generator

breaker

(GB 1)


Busbar

G

Generator

breaker

(GB 2)


CANbus

Controller

Display 1

Controller

Display 2



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2. If "SEMI-AUTO" is selected, all AGC units will change mode to semi-auto mode, and this way the

regulators will continue to regulate the load on the gensets which are still "visible" on the internal

CAN communication. This means that in the example with six gensets, the load sharing will contin-

ue between the units which are still connected (ID1-ID3 and ID4-ID6).

If the CAN error happens when no gensets are running, it will not block the whole system, and it will be possi-

ble to start all the gensets in SEMI-AUTO mode, even though the CAN error has not been fixed.

A message will be shown in the status line "BLACKOUT ENABLE" on the display.

If the CANbus error is p resent and no generator breakers are closed, it wil l be possible to

close two breakers on the same busbar, which may result in fatal damage to the whole system.

It is recommended to use the analogue load sharing (option G3) and an interlock system to

prevent this situation.

3. If "No mode change" is selected, all AGC units will stay in the mode they were in before the failure

appeared.

This setting makes it possible to keep the system in Auto mode in case of a CAN failure, however, the faulty

unit will not be a part of the power management, since it cannot send or receive status and commands on the

CANbus.

If this selection is used, it is recommended to use the CANbus fail class settings to disconnect the faulty units

(refer to the "CANbus fail class" in this chapter).

If the CANbus error is p resent and no generator breakers are closed, it wil l be possible to

close two breakers on the same busbar, which may result in fatal damage to the whole system.

It is recommended to use the analogue load sharing (option G3) and an interlock system to

prevent this situation.

6.3.2 Redundant CANbus communicationIt is possible to use two CANbus communication lines; CAN I/F 1 (A1/A2/A3) and CAN I/F 2 (B1/B2/B3). This

way, the communication will be redundant, and if one of the CANbus communication lines are damaged, the

application will still continue in Auto mode with full functionality.

6.3.3 CANbus alarmsThe following alarms can be displayed on an AGC unit in case of CANbus communication failures:

CAN A ID X MISSING

The AGC unit has lost CANbus communication to one or more CAN IDs on CANbus I/F A.

CAN A MAINS X MISSING

The AGC unit has lost CANbus communication to the AGC mains unit on CANbus I/F A.

CAN A BTB X MISSING

The AGC unit has lost CANbus communication to the AGC BTB unit on CANbus I/F A.

CAN B ID X MISSING

The AGC unit has lost CANbus communication to one or more CAN IDs on CANbus I/F B.



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CAN B MAINS X MISSING

The AGC unit has lost CANbus communication to the AGC mains unit on CANbus I/F B.

CAN B BTB X MISSING

The AGC unit has lost CANbus communication to the AGC BTB unit on CANbus I/F B.

MISSING ALL UNITS

The AGC unit has lost the CANbus communication to all the other units. The fail class set in menu 7533

will be executed.

FATAL CAN ERROR

The AGC unit has lost CANbus communication to more than one CAN ID on the CANbus line. The fail

class set in menu 7534 will be executed.

ANY DG MISSING

The AGC unit has lost CANbus communication to one of the generator CAN IDs on the CANbus line. Thefail class set in menu 7535 will be executed.

ANY MAINS MISSING

The AGC unit has lost CANbus communication to one of the mains CAN IDs on the CANbus line. The fail

class set in menu 7536 will be executed.

ANY BTB MISSING

The AGC unit has lost CANbus communication to one of the BTB CAN IDs on the CANbus line(s). The

fail class set in menu 7536 will be executed.

6.3.4 CANbus fail classIn menu 7530 it is possible to set a fail class of the following CANbus alarms:

Missing all units

Fatal CAN error

Any DG missing

Any mains missing

By using these settings, it is possible to disconnect the faulty units and in this way keep the system running in

Auto mode. (Depends on the setting 7532).

For a general description of "Fail class" please refer to the Designers Reference Handbook.

6.4 Quick setup

6.4.1 Quick setupThis function is made to provide an easy user interface for applications where it is vital for the end-user to be

able to change the application quickly and easily.

It is often applications for the rental market that need this flexibility, and therefore there are some limitations

as to which applications that can be handled through the quick setup menu.

The following applications can be handled through the quick setup menu.



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Island applications

Simple applications with connection to one mains



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6.4.2 LimitationsIn most cases, the rental applications are very simple applications, and therefore there are some limitations

that have to be considered when using the quick setup menu:

It will not be possible to have any AGC bus tie units in the application.

It will not be possible to set up a "dual mains" application through the quick setup menu.

This function is made to facilitate change of a plant configuration without AGC BTB units. Entering the quick

setup menu 9180 via the DU-2 display makes it possible to add or remove a genset without the use of utility

software. It is only possible to do the same basic setup as through the "application configuration" in the utility

software.

The functions marked with clear text in the screen shots below can be accessed through the quick setup

menu.



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6.5 9180 Quick setup

6.5.1 9180 Quick setup9181 Mode

OFF: When the mode menu is set to "OFF", the existing application that is about to have this genset

included will not look for this new genset. This will give the operator time to connect all wiring

and to do the basic setup of the genset.

Setup

Plant:

When the mode menu is set to "Setup Plant", the new AGC will receive the application config-

uration from the other units in the plant. The new AGC will then notify the rest of the applica-

tion that a new ID is available on the line. If the ID of the new AGC already exists, the new

AGC will based on the ID numbers in the application configuration have the highest ID + 1

assigned. This new ID will then be included in the application configuration in all the other

AGCs. During this process, the existing application will be able to continue running and will not

be affected by the upgrade of the system.

The new AGC will automatically go to block mode to ensure that it is in a safe mode. When the

setup is done, the end-user must decide in which running mode the added genset is to run.

If there are already 16 gensets on the CAN line and a new AGC tries to connect to the plant, an

alarm text, "No IDs available", will appear.

Setup

Stand-

alone:

When the mode menu is set to "Setup Stand-alone", the AGC will change the application

configuration, so it will no longer be a part of the application. When the ID is removed from

the application, the new application will be broadcasted to the other AGCs. The IDs of the

existing gensets in the application will maintain their ID, as a rearrangement could lead to

unnecessary starting and stopping of the gensets.

If the genset that is to be removed is running, it will not be possible/allowed to continue the

process until the genset has stopped. If it is attempted to disconnect, an info text, "Quick set-

up error", will appear.

If "Setup Stand-alone" is activated when the genset is running, an info text, "Quick setup er-

ror" , will appear.

If an AGC BTB is detected in the application, an indicating alarm, "Appl. no t possible", will ap-

pear.

Change of setup from standard to single DG unit: When disconnecting a standard AGC unit i n

a system, it is important to change the menu 9181, plant setup. After disconnecting, the AGC

unit will become a single DG.

6.5.2 9190 Application broadcastThis function makes it possible to broadcast an application over the CAN line from one AGC to all units

present in the application. It takes one operation to activate the broadcast function. It can be done in two

ways:

1. By sending the application.

2. By sending the application and activating it.



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Menu 9191 Enable

OFF: When it is set to OFF, no broadcast will be made.

Broadcast: Broadcast of the selected application in menu 9192 will be sent to the units in the

application.

Broadcast + Acti-

vate

Broadcast is activated and the application in menu 9192 will be broadcasted and

activated in all units.

Menu 9192 Application

Applications 1-4 can be drawn in the utility software.

The following pop-up windows in the utility software will guide you through the broadcast.



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7. Power management functions

7.1 Command unit

7.1.1 Command unitThe power management system is a multi-master system. In a multi-master system, the available generator

units automatically perform the power management control. This means that the system never depends on

only one master unit.

If for instance one unit ID is disabled, and this was the command unit, then the next available unit will take

over the command functions.

The above also applies to the AGC mains units in that case the command unit is called Mains Command

Unit (MCU).

The command unit cannot be selected by the operator. It is automatically selected when a power manage-

ment setting is accessed.

7.2 Load-dependent starting and stopping

7.2.1 Starting and stoppingThe purpose of this function is to ensure that sufficient power is always available on the busbar. This means

that the gensets will automatically be started and stopped in order to let only the sufficient number of gensets

run. This optimises the fuel economy and the maintenance intervals.

The load-dependent start/stop function is active when the plant is in AUTO mode. The starting and stopping

of the gensets is automatically carried out according to the adjusted setpoints and priority selection.

The load-dependent start/stop function can be selected as:

Rated power setpoint (P) [kW]

Apparent power setpoint (S) [kVA]

Actual or load percentage value [%]

The load-dependent starting and stopping can be selected to base on either produced power calculation (%)

or available power calculation (P or S).

The easiest way is to use produced power calculation; however, this method is not suited for systems with

three or more generators as regards fuel savings and saving running hours.

Option G4, G5 and G8, 4189340696 UK Power management functions


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7.2.2 TerminologyThe table shows the abbreviations used.

Short Description Comment

PAVAILABLE Available power PTOTAL- PPRODUCED

PTOTAL Total power PNOMINALof running sets with GBs closed

PPRODUCED Produced power

PNOMINAL Nominal power

PNOMINAL-STOP Nominal power of the genset to stop Priority-dependent

Deactivate load-dependent stop

The load-dependent stop can be deactivated through M-logic, should this be preferred. This is necessary e.g.

to allow operators to start the factory load after a blackout before the normal load-dependent operation canbe started.

In the example below, the function is activated with terminal 43. Now the operator can switch the load-de-

pendent stop ON or OFF with a switch connected to terminal 44.

Produced power method

This method is in effect if % power is selected in menu 8880 as basis for the start/stop calculation.

If the load % of a generator exceeds the "Start next" setpoint, the start sequence of the lowest priority genera-

tor in stand-by will be initiated.

If the load % of a generator drops below the "Stop next" setpoint, the stop sequence of the running generator

with the highest priority number will be initiated.

If the load of the plant decreases so much that the generator with the highest priority number can be stopped

and an available power of at least the stop setpoint in % is available, then the stop sequence of this generator

will be initiated.



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-200

-100

0

100

200

300

400

500

kW% load

Time

1 2 3

Load dep. start90

10Load dep. stop

1 Load increase

2 Load start delay runs out; PMS start command

3 Stand by genset running and connecting to the busbar

Power produced

% power

Available power method

This method is in effect if P [kW] or S [kVA] is selected as basis for the start/stop calculation.

Independent of the selection (P [kW] or S [kVA]), the functionality is basically identical; therefore the example

of the functionality below will be given for the load-dependent start function with selected rated power (P) val-

ue.

The apparent power setpoint is typically selected if the connected load has an inductive character and the

power factor is below 0.7.



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Description

This drawing illustrates the terms used.

PNOM1500 kW

PNOM1000 kW

PNOM1000 kW100%

70%

DG1 DG2 DG3

= 2450 kW

= 1050 kW (available power)

= 3500 kW ~ 100%

Consumed power at the busbar

Nominal power

The nominal power is the rated power of the genset that can be read on the type plate of the generator.

Total power

The total power is the summation of the rated nominal power of each individual genset. In the example above

the plant consists of three DGs:

DG1 = 1500 kW

DG2 = 1000 kW

DG3 = 1000 kW

That is a total of 3500 kW

Produced power

The produced power is defined as the existing load on the busbar. In the example above the produced power

is indicated as the hatched area, and the total of the three gensets = 2450 kW.

Available power

The available power is the difference between the maximum possible power produced by the gensets and the

actual produced power.

In the example above the plant consists of three gensets, in total 3500 kW. The load consumes 2450 kW in

total. Since the total load PTOTALis 3500 kW, and the produced load PPRODUCEDis 2450 kW, then the avail-

able power PAVAILABLEis 1050 kW, meaning that the gensets can handle this load if it should be added to

the busbar.



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7.2.3 Principle available power methodOne genset is running and is supplying the load. The load increases which means that the available power/

apparent power decreases. At a certain time the load has increased so much that only a little amount of pow-er/apparent power is available, and the next priority genset will be started in order to increase the amount of

available power/apparent power.

When the load drops, the available power/apparent power will increase. When the available power/apparent

power has increased above the stop level plus the nominal power of the last priority genset, then the last pri-

ority genset will be stopped. Please note that the nominal power of the genset to be stopped is added to the

adjusted stop level. The reason is that otherwise the available power/apparent power would immediately drop

below the start level again.

Example:

If the adjusted stop level is 200 kW (PSTOP= 200 kW), and the genset with the last priority is 1000

kW, it is necessary that the available power reaches 1200 kW, because the available power will be

reduced with 1000 kW immediately after the last priority genset is stopped.

7.2.4 Principle percentage methodOne genset is running and is supplying the load. The load increases which means that the % load increases.

At a certain time the load has increased so much that the load % start will start up the next priority genset in

order to take some of the load.

When the load drops, the produced power will decrease. When the produced power has decreased below the

stop level plus the nominal power of the last priority genset, then the last priority genset will be stopped.

Please note that the nominal power of the genset to be stopped is added to the adjusted stop level. The rea-

son is that otherwise the produced power would immediately drop below the start level again.

Example:

If the adjusted stop level is 10% (100 kW produced power), and the genset with the last priority is

1000 kW, the last priority generator will produce 20% (200 W) after stop. It is necessary that the start

level is above this value, otherwise an ongoing starting and stopping will take place.



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7.2.5 Adjust ing load-dependent startIn the example below the available power is 200 kW. When the load increases, the available power drops

below the start limit. The stand-by genset will start when the start timer runs out, and after the synchronisingthe available power increases (in this example to 500 kW).

-200

-100

0

100

200

300

400

500

P-Avail. on busbar

Time

1 2 3

Load start limit

1 Load increase

2 Load start delay runs out; PMS start command

3 Stand by genset running and connecting to the busbar

Measured P-Avail.Predicted P-Avail.



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7.2.6 Adjust ing load-dependent stopIn the example below the available power is 500 kW. When the load decreases, the available power increa-

ses to 750 kW. The AGC now calculates what happens if the last priority genset is stopped. In the examplebelow the last priority genset is 400 kW which means that it can be stopped, because the available power will

still be above the stop level.

Now the difference between the stop level and the available power is 50 kW. This means that only if the gen-

set, which now has the last priority, is 50 kW, it can be stopped!

700

600

400

500

300

200

100

0

Load decreases

Load stop delay runs out; PM stop command

Last priority genset stopped

Load stop limit

1

1

2

3

2 3

If the order of priorit y is changed, the following must be observed:

If the priority does not seem to change as expected, it is because the load-dependent stop

function is not able to stop the lowest priority after having started the new first priorit y. Thatwould cause two DGs to be running at low load instead of one DG.



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7.2.7 Power windowThe difference between the programmed load-dependent start and stop limits forms the power hysteresis be-

tween the start and stop. This is shown in the diagram below:

Available power

at the busbar

Load-depending start

Load-depending stop

Load stop

limit

Load start

limit

1. DG

Start

2. DG

Start

3. DG

Start

3. DG

Stop

2. DG

Stop

Power

window

PDG1

PDG2

PDG3

PDG3

PDG2

7.3 Load management

7.3.1 Load managementThe function is used to activate a relay when a specific amount of power is available. The purpose of this

function is to be able to connect load groups when the gensets of the emergency power plant are running.

In each of the gensets, five levels can be adjusted (menus 8220-8260):

Available power 1

Available power 2

Available power 3

Available power 4

Available power 5

These setpoints can activate a relay when the specific amount of available power is reached. The relay out-

put can be used for connecting load groups when sufficient power is available. The relays will activate when

the available power is higher than the setpoint, but be aware that when the load groups are being connected,

the available power will decrease and the relay(s) deactivate again if the available power is below the set-

point. So it is necessary to make an external holding circuit.

The number of available relays is option-dependent.

The function is not depending on the running modes. The relays will activate in all modes including block. To

avoid activation, e.g. when the genset is stopped, the inhibit function should be used.



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Regarding the inhibit function, please refer to the Designers Reference Handbook.

It is possible to adjust different levels of available power in all gensets. This gives the possibility to use sever-

al load groups if this is necessary.

Example:

In the example below, generator #1 is started followed by generator #2. The simplified diagram shows the two

gensets and two load groups that are being connected by the available power relays R1 and R2 on AGC1.

G


G


Load

Group 1

Trip load group 1

R1

K1

K1Load

Group 2

Trip load group 2

R2

K2

K2

R1 R2

Multi-line 2 Multi-line 2

7.3.2 Functionality description (refer to the diagram below)The generator #1 is started, and the timer t1 starts running when the GB1 closes. When the t1 is expired, the

selected relay activates (R1), and in the example a 200 kW load group is connected. Now the available power

falls to 300 kW. After some time the generator #2 is started and its generator breaker is synchronised. When

the GB2 closes, the timer t2 runs. When the timer t2 expires, the selected relay activates (R2), and the sec-

ond load group of 200 kW is connected. Now the available power falls to 600 kW.



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GB1ON

t1

t2

R1 R2

200

1000

800

600

400

PAVAIL

kW

GB2ON

To connect the load groups, individual relays can be selected on each AGC or on one of the AGC units only.

7.4 Load sharing

7.4.1 Load sharingWhen the power management communication is running, the load sharing between the gensets is done byusing the CANbus communication between the AGC units.

If both CANbus ports are being used (A1-A3 and B1-B3), the communication automatically switches to the

other port if e.g. A1-A3 is disconnected or faulty. (Please refer to the description of redundant CANbus).

If both CANbus lines are disconnected or faulty, the AGCs do not automatically switch over to analogue load

sharing. This has to be set up in M-logic: Use the command "Force analogue loadshare". Now the load shar-

ing continues based on the signals from terminals 37/38/39. This means that the power management will be

lost, but the gensets already running will stay stable.

The option G3 has to be active to have the backup of the analogue load share line.



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7.5 Island ramp up

7.5.1 Island ramp up with load steps

Power[kWh]

Time [sec]GB closed

Delay,step1

Power ramp [%/s]

CAN load share setpoint

Rampup,read

fromloadshare

line S

tandardload

sharing

One step before theload share setpoint is

reached the ramp upfunction is switched off

Delay,step2

Delay,step3

Delay,step4

Delay,step5



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7.6 Fixed power ramp up with load steps

Power[kWh]

Time [sec]GB closed

Delay,step1

Power ramp[%/s]

Power Set point

Rampdown

Stop signal

Rampup,read

Fromloadshare

line

Delay,step2

Delay,step3

Delay,step4

Delay,step5

When menu 2614 is enabled, the power setpoint continues to rise in ramp up steps, determined by menu

2615, towards the load sharing setpoint. The delay time between each ramp up step will be determined by

menu 2613. The ramp up will continue until the load sharing setpoint is reached and then switch the regulator

to standard load sharing mode.

If the delay point is set to 20% and the number of load steps is set to 3, the genset will ramp to 20%, wait the

configured delay time, ramp to 40%, wait, ramp to 60%, wait and then ramp to the system setpoint. If the

setpoint is at 50%, the ramp will stop at 50%.

7.7 Freeze power ramp

A way to define the ramp up steps is to use the freeze power ramp command in M-logic.

Freeze power ramp active:

1. The power ramp will stop at any point of the ramp, and this setpoint will be kept as long as the function is

active.

2. If the function is activated while ramping from one delay point to the other, the ramp will be fixed until the

function is deactivated again.

3. If the function is activated while the delay timer is timing out, the timer will be stopped and will not contin-

ue until the function is deactivated again.



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7.8 ATS appl ications

Two possibilities are available; the mains unit can either be installed or not.

7.8.1 AGC mains installed

See single line diagram for " Parallel with mains plant" .

In an AMF application the AGC mains will normally operate the mains breaker and thereby make sure that

the supply is coming from the mains if this is healthy.

This function allows the AGC to be used in an application where an automatic transfer switch is installed. This

is known as an ATS.

In the applications shown as one-line diagrams in the chapter Functional description it can be seen that theATS will take care of the switching between the generator supply and the mains supply.

If ATS is selected, the AGC has no control over the ATS ("mains breaker").

Description

Normally the AGC detects a mains failure based on the voltage and frequency measurement on the mains.

However, when ATS is selected in menu 7085 it is necessary to use a digital input together with the position

feedbacks from the ATS. Thus, the mains failure is not detected by the AGC measurements but by the follow-

ing two requirements:

1. Alternative start input ON2. ATS (MB) feedback OFF

To make the AGC detect a mains failure, the alternative start input has to be ON and the MB OFF feedback

has to be active.

The input used as "Al ternative start" function is configured in the PC utility software (USW).

The mains unit will not try to operate the ATS (mains breaker) at all. But it is still necessary that position feed-

backs are wired up.

It is possible to have a tie breaker installed. This is useful if more gensets need to be started before supplying

the load, because the tie breaker will not close until the required number of gensets is available.

7.8.2 ATS island mode

See single line diagram for " Island operating plant".

If this application is needed, the gensets can be started by activating the "auto start/stop" input. The gensets

will be started and stopped according to the power demand. That is, they will operate in load-dependent start/

stop mode.



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Be aware that since no tie breaker is installed, it is important that the fir st genset to close on

the busbar can carry the load. If the load is too high, the genset will be overloaded.

This application can be combined with the multi start function .

7.9 Fail class

The fail classes described in the Designers Reference Handbook are still valid when the power management

option is selected. In addition to these fail classes the safety stop can be used in the AGC units with power

management.

This means that when a trip + stop alarm occurs, the faulty genset will stay on the busbar until the next priori-

ty genset is started and synchronised to the bus. When the incoming genset has taken the load, the faulty

genset will ramp down the power, followed by trip of the breaker, cooling down of the engine and finally stop.

If the faulty genset has the last priority, or no standby gensets are available, then it will stay on the busbar

and will not trip.

If no genset can start in a safety stop situation, then the faulty genset will no t be stopped.

Therefore it is important that the safety stop is backed up, e.g. by a trip and stop alarm or a

shutdown alarm.

7.10 Local/remote/timer operation

The plant can be adjusted to local, remote or timer operation (menu 8021). This selection is done in the com-

mand unit, i.e. one of the generator units.

The setting defines how the plant is started while it is in AUTO mode.

The settings can be changed in M-logic and via display or PC utility software.

Display Utility SW

(Parameter setup)

M-logic

Local X X X

Remote start X X X

Timer start X X -

The purpose of the selection is to decide whether the plant can be started from the display (local operator),

from remote (e.g. PLC) or by an internal timer. Remote means that the control can be carried out by activat-

ing the digital input or through Modbus/Profibus communication.

7.10.1 Local selectionAll operation is carried out on the display. In island operation any generator unit display can be used, and in

load takeover, mains power export and fixed power the mains unit display must be used. The plant mode

must be AUTO.



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7.10.2 Remote select ionThe plant is started using the digital input "auto start/stop" when "remote" is selected.

Island mode

In island mode the "auto start/stop" input on any of the generator AGCs can be used for starting the plant.

However, DEIF recommends to wire up the "auto start/stop" input to all of the AGCs to be sure that the auto-

matic operation is able to continue even though one of the DGs is taken out for service (power supply discon-

nected to the AGC).

In island mode any running mode (MAN, AUTO, SEMI, BLOCK) can be selected on the generator units, and

the remote start signal is still working for the remaining AGC which is still in AUTO mode.

Parallel to mains mode

In load takeover, mains power export and fixed power mode the "auto start/stop" input on the mains unit must

be used for starting the plant.

7.10.3 Plant operationThe table shows how the plant is started:

Plant mode Selection Local Remote

Island mode Display on generator units Auto start/stop on gen. units

Fixed power mode Display on mains unit Auto start/stop on mains unit

Mains power export Display on mains unit Auto start/stop on mains unit

Load takeover Display on mains unit Auto start/stop on mains unit

In peak shaving and AMF the automatic operation starts automatically depending on the impor-

ted power (peak shaving) or mains failures (AMF).

7.10.4 Timer selectionThe operation of the plant is controlled by up to eight internal command timers which are programmed using

the PC utility software (USW).

The function can be used in load takeover, mains power export and fixed power, and the mains unit has to be

in auto.



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7.10.5 Principle

Start

LocalNo

RemoteNo

Press stop

button

Plant runningPress start

button

Yes

No

Yes

Yes

Local mode

Stop plant

No

No

Yes

Start plantAuto

start/stop

ON

Plant running

Auto

start/stop

ON

Yes

Yes

No

Yes

Remote mode

Start plant

No

Yes

No

Stop plant

Timer ON

Plant running Timer ONYes

No

Yes

Timer mode

Start plant

No

Yes

No

Stop plant

Yes



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7.11 Multi starting gensets

The multi-start function can be used to determine the number of gensets to start. This means that when the

start sequence is initiated through push-button, digital input or automatic start, then the adjusted numbers of

gensets will start.

This function is typically used e.g. together with applications where a certain number of gensets is required to

supply the load.

Example:

In an AMF application with a tie breaker, the tie breaker must not close before the maximum power is

available (power capacity setpoint).

The multi-start function is adjusted in menu 8922-8926.

7.11.1 Multi-start configurationThe multi-start function can be adjusted to operate with two different settings. These settings consist of set-

points for how many gensets to start and the minimum number of running gensets.

It is possible to switch between the settings using M-Logic or menu 8924.

Setpoint 1 Setpoint 2

Multi-start (numbers to start) 8922 8925

Min no. running 8923 8926

Default setting

Star t condi tion Setpoint 1 Setpoint 2 Default set ting of DGs to star t

Emergency operation Mains failure - X Start all DGs

Normal operation No mains failure X - Auto calculate

The default setting of the selection between setpoint 1 and setpoint 2 is made so the setpoint 1 is adjusted to

"Auto calculation" and is used in all modes except for AMF. Setpoint 2 will automatically be selected in case a

mains failure occurs (this is adjusted in M-logic). Setpoint 2 is adjusted to 16 gensets which means that all

available gensets will start when the mains failure occurs.



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The default setting can be changed, if convenient.

7.11.2 Numbers to startThe numbers to start (menu 8922/8925) can be selected depending on the number of DGs available. The

load-depending start and stop function will be active as soon as the generator breakers are closed or, if a tie

breaker is installed, as soon as the tie breaker is closed. It is possible to adjust the number of gensets, or an

auto calculation can be selected.

If it is needed to delay the load-dependent start and stop function, it can be done through the

M-logic funct ion.

Auto calculation

When auto calculation is selected, the sufficient number of gensets will be started as soon as the start com-

mand is given. This is not depending on the plant mode.

Example:

In a four DG plant each generator is rated with 1000 kW. The setpoint for load-dependent start (menu

8001) is adjusted to 100 kW.

If a start command is given in fixed power mode and the setpoint is 2000 kW, then three gensets will

be started immediately and the fourth genset will remain stopped. Three gensets will be started be-

cause two gensets are requested to supply the load (2*1000 = 2000 kW) and the load-dependent start

function requests the third genset.

7.11.3 Minimum numbers runningThe multi starting function can be combined with the setting of a minimum number of running gensets (menu

8923/8926). This means that the load-dependent stop function is disregarded when only the specific number

of gensets is running. This is also the situation even though the load would justify a load-dependent stop

Option G4, G5 and G8, 4189340696 UK_2012.07.13

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